{
  "id": "1004.2368",
  "version": "v1",
  "published": "2010-04-14T10:44:59.000Z",
  "updated": "2010-04-14T10:44:59.000Z",
  "title": "Statistical Analysis of Water Masers in Star-Forming Regions: Cepheus A and W75 N",
  "authors": [
    "L. Uscanga",
    "J. Cantó",
    "J. F. Gómez",
    "G. Anglada",
    "J. M. Torrelles",
    "N. A. Patel",
    "A. C. Raga",
    "S. Curiel"
  ],
  "comment": "16 pages, 8 figures, and 3 tables. Accepted by The Astrophysical Journal",
  "categories": [
    "astro-ph.GA",
    "astro-ph.SR"
  ],
  "abstract": "We have done a statistical analysis of Very Long Baseline Array (VLBA) data of water masers in the star-forming regions (SFRs) Cepheus A and W75 N, using correlation functions to study the spatial clustering and Doppler-velocity distribution of these masers. Two-point spatial correlation functions show a characteristic scale size for clusters of water maser spots < or ~1 AU, similar to the values found in other SFRs. This suggests that the scale for water maser excitation tends to be < or ~1 AU. Velocity correlation functions show power-law dependences with indices that can be explained by regular velocity fields, such as expansion and/or rotation. These velocity fields are similar to those indicated by the water maser proper-motion measurements; therefore, the velocity correlation functions appear to reveal the organized motion of water maser spots on scales larger than 1 AU.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-04-14T10:44:59.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "statistical analysis",
      "star-forming regions",
      "water maser spots",
      "two-point spatial correlation functions",
      "water maser proper-motion measurements"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/0004-637X/715/1/132",
      "journal": "The Astrophysical Journal",
      "year": 2010,
      "month": "May",
      "volume": 715,
      "number": 1,
      "pages": 132
    },
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 851939,
      "adsabs": "2010ApJ...715..132U"
    }
  }
}